Abstract:

In this paper, four different commercially available sources of α-Al2O3 powder which were marked as domestic A,domestic B,import A,import B,were added into low cement castables quality bauxite.The experimental results showed that,Al2O3 powder of import A has bimodal distribution and fine particles,so it fills better and helps the system sintered well;the sample containing import A powder has the best performance;the sample containing domestic B powder has wider distribution of particle size and larger particles,so it has the worst performance;the sample containing domestic A powder has narrow distribution of particle size,and its performance index is second only to importing A powder.